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| Home > Publications Database > Propagation of sharp wave-ripple activity in the mouse hippocampal CA3 subfield in vitro. > print |
| 001 | 272595 | ||
| 005 | 20241017164444.0 | ||
| 024 | 7 | _ | |a 10.1113/JP285671 |2 doi |
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| 024 | 7 | _ | |a 0022-3751 |2 ISSN |
| 024 | 7 | _ | |a 1469-7793 |2 ISSN |
| 037 | _ | _ | |a DZNE-2024-01216 |
| 041 | _ | _ | |a English |
| 082 | _ | _ | |a 610 |
| 100 | 1 | _ | |a Schieferstein, Natalie |0 0000-0002-8784-9175 |b 0 |
| 245 | _ | _ | |a Propagation of sharp wave-ripple activity in the mouse hippocampal CA3 subfield in vitro. |
| 260 | _ | _ | |a Hoboken, NJ |c 2024 |b Wiley-Blackwell |
| 336 | 7 | _ | |a article |2 DRIVER |
| 336 | 7 | _ | |a Output Types/Journal article |2 DataCite |
| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1729175232_2186 |2 PUB:(DE-HGF) |
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| 520 | _ | _ | |a Sharp wave-ripple complexes (SPW-Rs) are spontaneous oscillatory events that characterize hippocampal activity during resting periods and slow-wave sleep. SPW-Rs are related to memory consolidation - the process during which newly acquired memories are transformed into long-lasting memory traces. To test the involvement of SPW-Rs in this process, it is crucial to understand how SPW-Rs originate and propagate throughout the hippocampus. SPW-Rs can originate in CA3, and they typically spread from CA3 to CA1, but little is known about their formation within CA3. To investigate the generation and propagation of SPW-Rs in CA3, we recorded from mouse hippocampal slices using multi-electrode arrays and patch-clamp electrodes. We characterized extracellular and intracellular correlates of SPW-Rs and quantified their propagation along the pyramidal cell layer of CA3. We found that a hippocampal slice can be described by a speed and a direction of propagation of SPW-Rs. The preferred propagation direction was from CA3c (the subfield closer to the dentate gyrus) toward CA3a (the subfield at the boundary to CA2). In patch-clamp recordings from CA3 pyramidal neurons, propagation was estimated separately for excitatory and inhibitory currents associated with SPW-Rs. We found that propagation speed and direction of excitatory and inhibitory currents were correlated. The magnitude of the speed of propagation of SPW-Rs within CA3 was consistent with the speed of propagation of action potentials in axons of CA3 principal cells. KEY POINTS: Hippocampal sharp waves are considered important for memory consolidation; therefore, it is of interest to understand the mechanisms of their generation and propagation. Here, we used two different approaches to study the propagation of sharp waves in mouse CA3 in vitro: multi-electrode arrays and multiple single-cell recordings. We find a preferred direction of propagation of sharp waves from CA3c toward CA3a - both in the local field potential and in sharp wave-associated excitatory and inhibitory synaptic activity. The speed of sharp wave propagation is consistent with the speed of action potential propagation along the axons of CA3 pyramidal neurons. These new insights into the dynamics of sharp waves in the CA3 network will inform future experiments and theoretical models of sharp-wave generation mechanisms. |
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| 650 | _ | 7 | |a CA3a/CA3b/CA3c subregions |2 Other |
| 650 | _ | 7 | |a hippocampus |2 Other |
| 650 | _ | 7 | |a mouse |2 Other |
| 650 | _ | 7 | |a multi‐electrode array recording |2 Other |
| 650 | _ | 7 | |a patch‐clamp recording |2 Other |
| 650 | _ | 7 | |a sharp wave‐ripple complexes |2 Other |
| 650 | _ | 2 | |a Animals |2 MeSH |
| 650 | _ | 2 | |a CA3 Region, Hippocampal: physiology |2 MeSH |
| 650 | _ | 2 | |a Mice |2 MeSH |
| 650 | _ | 2 | |a Mice, Inbred C57BL |2 MeSH |
| 650 | _ | 2 | |a Male |2 MeSH |
| 650 | _ | 2 | |a Pyramidal Cells: physiology |2 MeSH |
| 650 | _ | 2 | |a Action Potentials: physiology |2 MeSH |
| 650 | _ | 2 | |a Patch-Clamp Techniques |2 MeSH |
| 700 | 1 | _ | |a Del Toro, Ana |b 1 |
| 700 | 1 | _ | |a Evangelista, Roberta |0 0000-0002-0449-5464 |b 2 |
| 700 | 1 | _ | |a Imbrosci, Barbara |0 P:(DE-2719)2811257 |b 3 |u dzne |
| 700 | 1 | _ | |a Swaminathan, Aarti |0 0000-0002-5127-1893 |b 4 |
| 700 | 1 | _ | |a Schmitz, Dietmar |0 P:(DE-2719)2810725 |b 5 |u dzne |
| 700 | 1 | _ | |a Maier, Nikolaus |0 0000-0001-5203-0736 |b 6 |
| 700 | 1 | _ | |a Kempter, Richard |0 0000-0002-5344-2983 |b 7 |
| 773 | _ | _ | |a 10.1113/JP285671 |g Vol. 602, no. 19, p. 5039 - 5059 |0 PERI:(DE-600)1475290-6 |n 19 |p 5039 - 5059 |t The journal of physiology |v 602 |y 2024 |x 0022-3751 |
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